hermeticum/client/cmd/main.go

package main

import (
	"context"
	"errors"
	"flag"
	"fmt"
	"log"
	"time"

	"github.com/vilmibm/hermeticum/proto"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials/insecure"
)

var (
	tls                = flag.Bool("tls", false, "Connection uses TLS if true, else plain TCP")
	caFile             = flag.String("ca_file", "", "The file containing the CA root cert file")
	serverAddr         = flag.String("addr", "localhost:6666", "The server address in the format of host:port")
	serverHostOverride = flag.String("server_host_override", "x.test.example.com", "The server name used to verify the hostname returned by the TLS handshake")
)

func _main() error {
	var opts []grpc.DialOption
	if *tls {
		return errors.New("TODO tls unsupported")
		/*
			if *caFile == "" {
				*caFile = data.Path("x509/ca_cert.pem")
			}
			creds, err := credentials.NewClientTLSFromFile(*caFile, *serverHostOverride)
			if err != nil {
				log.Fatalf("Failed to create TLS credentials %v", err)
			}
			opts = append(opts, grpc.WithTransportCredentials(creds))
		*/
	} else {
		opts = append(opts, grpc.WithTransportCredentials(insecure.NewCredentials()))
	}

	conn, err := grpc.Dial(*serverAddr, opts...)
	if err != nil {
		return fmt.Errorf("fail to dial: %w", err)
	}
	defer conn.Close()

	client := proto.NewGameWorldClient(conn)

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	pong, err := client.Ping(ctx, &proto.SessionInfo{})
	if err != nil {
		log.Fatalf("%v.Ping -> %v", client, err)
	}

	log.Printf("%#v", pong)

	return nil
}

func main() {
	err := _main()
	if err != nil {
		log.Fatal(err.Error())
	}
}